﻿/****************************************************************************************************
	Copyright (C) 2010 RapidWebDev Organization (http://rapidwebdev.org)
	Author: Eunge, Legal Name: Jian Liu, Email: eunge.liu@RapidWebDev.org

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ****************************************************************************************************/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.ServiceModel;
using BaoJianSoft.Common.Web;

namespace BaoJianSoft.Platform.Initialization
{
	/// <summary>
	/// Default application name loader
	/// </summary>
	public class DefaultApplicationNameRouter : IApplicationNameRouter
	{
		/// <summary>
		/// Get application mapping dictionary. 
		/// The key is HttpContext.Current.Request.Url.Authority and value is application name.
		/// If application name is not configured, returns HttpContext.Current.Request.Url.Authority.
		/// </summary>
		public Dictionary<string, string> Mapping { get; set; }

		/// <summary>
		/// True to allow request on Uri authority which is not configured in the property Mapping.
		/// </summary>
		public bool AllowsAnonymousUriAuthority { get; set; }

		/// <summary>
		/// Get application name.
		/// </summary>
		/// <returns></returns>
		public string GetApplicationName()
		{
			string authority = null;
			if (HttpContext.Current != null)
				authority = HttpContext.Current.Request.Url.Authority;
			else if (OperationContext.Current != null && OperationContext.Current.Channel != null && OperationContext.Current.Channel.LocalAddress != null)
				authority = OperationContext.Current.Channel.LocalAddress.Uri.Authority;

			string returnValue;
			if (this.Mapping != null && this.Mapping.ContainsKey(authority))
				returnValue = this.Mapping[authority];
			else
			{
				if (!this.AllowsAnonymousUriAuthority)
					throw new BadRequestException();
				else
					returnValue = "localhost";
			}

			return returnValue;
		}
	}
}
